Focusing on artistic and sociological correlations between theatre, picture books, and dolls from the late 19th century to the early 20th century, we found triangular reversible transformations between them.Although these three media are seemingly irrelevant to each other, they symbolically represent modes of life. As popular styles were adopted as theatrical costumes, they often influenced styles generally worn out side of theatres. The similar phenomena were found in the correlation between representations of costumes in popular picture books and children's dresses. Even dolls, in particular, "Seto Novelties," functioned as media for reflecting as well as stimulating contemporary fashion and popular lifestyle.We firmly believe that our interdisciplinary research provides a new vista for understanding of art-sociological studies on burgeoning popular cultures in the last century.